Concrete bridge.



lD. B. LUTEN. CONCRETE BRIDGE. APPLIOATIN 1711.31) MAR. 29. 1909.

Patente-sem 14, 1909.

' @vih/exea I I I 30 erected for one skewback in the manner 35 the spandrel walls and th DANIEL B. LUTENQOF INDIANAIPOLIS, INDIANA. l

, 'CONCRETE BRIDGE.

Original application filed November 1, Ai906, Serial No. 341,605.

' AV n Specication o! Letters'aten't. Patented Sept, 14, 1909.

- Dvidedand this application led March 29,

1909. Serial )10.486,642.

State ofIndiana, have invented .certain new and useful ImprovementsA in Concrete Bridges, of Which the followingisa specification.

My invention relates to concrete structures A and the object of my invention isto provide' for arch structures and improved centering` for 'constructing to provide improved means "spandrel AWallel and copings so ,that irregularities will -be avoid such improvements in details and methods d,v `And to provide of construction as shall hereinafter be pointed out.

Thisapplicfatyion is` a plication led'by me Nov. 1,1906, Serial No.

' The accompanying. drawings illustrate my' invention.

Figure l, is a vertical longitudinal section.

of an arch supportedfon its centering: an

Fig. 2, is a detail of my improved means for obtaining a substantially straight spandrel Wall.

The abutments or'piers'Ql are built tothe springing lines' S and centering is then of the arches,.the centering being wide enough to support a ring. The concrete islaid upon this centering until the entire ringis produced from skewback to' already described, j s pandrel posts being left until the last. I he end rings of the arch and spandrel Walls. are then formed toether, or substantially together, thus bringing the joint in theintra os of the arch .in-

{10 stead ff the en'd face of the structure.

In-building a concrete Wall with agprojecting ledge or coping, as for instance the co ing of a spandrel Wall, it is a very diii- 'cu t matter to maintain the form in truelines,

fanchors m forms by adjusting. the tension members, subsequently" concreting the spandrels or `division of -an ap-l' as the Wet concrete tends to Warp the forms. In building thecenter rings ofthe arches, anchors 8l are embedded in the concrete so that, when. the spandrel Wall and final arch ring are formed, double Wires are attached to the anchors S0 at one" end and to the upper edge of the Wall forms 82 so that by twisting-the Wires together the spandrel Wall forms may be brought to accurate alinement. These wires may be readily clipped at the inner faces of the spandrel Walls When the same have hardened. I claim as my invention: l. That improvement in the art of building an arch or bridge comprising erecting foi-'nis for .spandrels or walls, connecting said forms by adjustable tension members to the' arch or bridge, alining th Walls in the forms.

i 2. That improvement in the art of build an arch or bridge comprising erecting attaching ading forms for' spandrels .ortwalls, justabl'e members to the forms, alining the forms by adjusting thetension members,

Walls.

That improvement inthejart of building an arch or vbridge comprising erecting forms for. the spandrels or Walls, providing adjustable tension members transverse to the forms, and alining theV forms byadjusting the tension members while'illing the forms with hardening plastic. A In Witness whereof, I, have hereunto sot my hand andv seal at Indianapolis. Indiana,

l.this fifteenth day of March, A. D. one thousand nine hundred and nine.

' DANIEL B. LU'IEN. [ns- Witnesses: i

' C. H.. KN Icirr,

THOMAS W. Maliens.

' and subsequently concretingthe spandrels or o 

